"When security problems pop up, Microsoft almost always
releases its fixes on a monthly schedule on Patch Tuesday. This
month, for example, Microsoft released an 'insane' number of bugs
fixes. 10 of the 23-fixed security holes were already being used by
attackers before Microsoft patched them.
"It's a different story when security problems show up in Linux.
With Linux, security troubles are fixed almost as soon as they show
up. Because Linux is open source, security holes tend to be quickly
spotted and then repaired."